Date: Sun, 14 Dec 2025 02:51:47 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 290920] FreeBSD 15 Regression: BHyve PCI Passthrough Broken on 15-STABLE (No GSI/Interrupt Remapping Failure) Message-ID: <bug-290920-27103-e7Wweni7Qa@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-290920-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-290920-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290920 --- Comment #27 from dan@sunsaturn.com --- (In reply to Bojan Novković from comment #25) Works perfectly, thank you! This patch successfully resolves the PCI passthrough failure (previously observed as 'PCI INT A: no GSI') for multiple device types, confirming the IOMMU mapping issue in vmm.c is corrected. Testing Confirms Passthrough for: * **NVIDIA GPU Passthrough** (Tesla V100) * **USB Controller Passthrough** (via a PCI-e USB controller hosting Zigbee/Z-Wave dongles) --- **Testing Procedure** The environment was fully synchronized after patching vmm.c and reverting the previous libvmmapi workaround. 1. Reverted local libvmmapi.c change to original source (restoring the userland to a clean state). 2. Cleaned source, applied the new kernel patch, built, and installed. cd /usr/src git pull make clean cleanworld patch -p1 -d /usr/src < /root/freebsd-usb3.patch make -j$(sysctl -n hw.ncpu) buildworld make -j$(sysctl -n hw.ncpu) buildkernel make installkernel shutdown -r now etcupdate -p cd /usr/src; make installworld etcupdate -B make -DBATCH_DELETE_OLD_FILES delete-old delete-old-libs # Reverted the kernel patch for clean future git pulls: patch -p1 -R -d /usr/src < /root/freebsd-usb3.patch shutdown -r now --- **Results (Inside Linux Guest VM)** **1. GPU Passthrough Validation (nvidia-smi)** ubuntu:/data/remote/sunsaturn/home/dan # nvidia-smi Sat Dec 13 20:48:48 2025 +-----------------------------------------------------------------------------------------+ | NVIDIA-SMI 580.95.05 Driver Version: 580.95.05 CUDA Version: 13.0 | +-----------------------------------------+------------------------+----------------------+ | GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC | | Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. | | | | MIG M. | |=========================================+========================+======================| | 0 Tesla V100-PCIE-16GB Off | 00000000:00:06.0 Off | 0 | | N/A 49C P0 46W / 250W | 1272MiB / 16384MiB | 0% Default | | | | N/A | +-----------------------------------------+------------------------+----------------------+ +-----------------------------------------------------------------------------------------+ | Processes: | | GPU GI CI PID Type Process name GPU Memory | | ID ID Usage | |=========================================================================================| | 0 N/A N/A 1193 C python3 1268MiB | +-----------------------------------------------------------------------------------------+ ubuntu:/data/remote/sunsaturn/home/dan # **2. USB Passthrough Validation (lsusb output)** # lsusb Bus 005 Device 001: ID 1d6b:0002 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 003 Device 001: ID 1d6b:0002 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 001 Device 001: ID 1d6b:0002 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 006 Device 001: ID 1d6b:0003 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 001 Device 002: ID 303a:4001 Nabu Casa ZWA-2 Bus 004 Device 001: ID 1d6b:0003 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 002 Device 001: ID 1d6b:0003 Linux 6.12.51-haos xhci-hcd xHCI Host Controller Bus 003 Device 002: ID 10c4:ea60 Itead Sonoff Zigbee 3.0 USB Dongle Plus V2 Bus 006 Device 002: ID fb5d:0001 BHYVE HID Tablet # This fix appears ready for commitment. -- You are receiving this mail because: You are the assignee for the bug.help
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